(-4,4) (2,1) gradient = (1-4)/(2--4) = -1/2 y = mx + c y = -1/2x + c Replace point (2,1) in the equation 1=-1/2(2) +c c = 2 Equation : y = -1/2x + 2 y-2 = -1/2x Answer is C. Hope it helped!
200-50= 150 So you need to get 150 dollars in a month. If you get 20 dollars a week, then 150/20 will give you 7.5. So it will take you 7.5 weeks to get 150 dollars